<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>加加减减</title>
</head>

<body>
    <div id="app">
        <button @click="random">走一走</button>
        <ul>
            <li v-for="(item,index) in dataList" :key="index">
                <span>{{item.id}}</span>
                <button @click="del(item.id)">{{item.content}}</button>
            </li>
        </ul>
    </div>
    <script src="./vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                dataList: []
            },
            methods: {
                random() {
                    this.dataList.unshift({id:Math.floor(Math.random() * 20),content:'删除'})
                },
                del(id) {
                    this.dataList = this.dataList.filter(item => item.id !== id)
                }
            }

        })
    </script>
</body>

</html>